Simplicity 388175A Sidewinder Portable Automatic Bobbin Winder Machine | 120 VoltagePackage comes with (1) bobbin winding machine, as well as manual and a power cord Our automatic bobbin winder features 120 voltage and works with most bobbins, but does not fit bobbins from Singer Centaur II, Husqvarna Viking, and some Brother machines A simple, easy way to transfer thread from a spool to a bobbin, this bobbin winder comes in a compact size and is a must have in any set of sewing supplies Whether you're a beginner or an expert, any